Cat litter box



FIG. 1 is a front elevational view of a cat litter box embodying myornamental design;

FIG. 2 is a right and left side elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a bottom plan view thereof.

The ornamental design for a cat litter box, as shown and described.